Asking to know what I’m missing as my music lives on Spotify, movies online, photos on iCloud, and documents wherever they are shared with users or on iCloud Drive. So, what could I use the local storage for? And how fast is it expandable storage compared to onboard flash?
In the past I've carried a music library and some movies or TV series, but I mostly stream those these days. (I used to fly more often, so a local copy was more important then.)
Also, I like to try out different Android flavors on my phone occasionally, and it's nice to be able to pop out the microSD and know that no matter what I happens during the installation, that data is still safe.
I'm sure it's not as fast as the internal storage, but for the way I use it, it's fast enough that I don't really notice the speed.